抄録
Measurements of the angle-resolved specific heat C (H, θ) have been performed on PrOs4 Sb12 and URu2 Si2 in order to examine their superconducting gap structures. In the filled skutterudite PrOs4 Sb12, a clear fourfold angular dependence is observed with H rotated in the (1 0 0) planes, whose field variation suggests gap minima along [1 0 0] directions. Interestingly, a reversed angular oscillation of C (H, θ) has been observed in the normal state above Hc 2 which continues to grow as the high-field antiferroquadrupole phase is approached. In URu2 Si2, C (H, θ) with H rotated around the tetragonal c-axis suggests that the nodal structure has rotational symmetry. Comparison between the C (H) data for a- and c-axes indicates the existence of point nodes along the [0 0 1] direction.
本文言語 | 英語 |
---|---|
ページ(範囲) | 990-993 |
ページ数 | 4 |
ジャーナル | Physica B: Condensed Matter |
巻 | 403 |
号 | 5-9 |
DOI | |
出版ステータス | 出版済み - 2008/04/01 |
ASJC Scopus 主題領域
- 電子材料、光学材料、および磁性材料
- 凝縮系物理学
- 電子工学および電気工学